Damage is the actions of players, NPC's, and Monsters that "hurt" the opponent. Damage in game will show up as numbers. Red numbers are the damage you take, and will decrease your health bar. White numbers are physical hits through attacking, but not with skills. Yellow numbers represent the damage skills do. Any number with a "*" (Asterisk) is magical damage.
 How Damage Works
Damage is divided into two categories: Physical damage and Magical damage. Physical damage is dealt by hitting an enemy with a weapon or physical force and Magical damage is dealt by hitting an enemy with a spell or mystic forces.
Classes such as the Warrior (Mercenary and Swordsman), Cleric (Paladin), and Archer (Sharpshooter and Acrobat) tend to rely on physical damage, while the Sorceress (Elementalist and Mystic) and Cleric (Priest) tend to rely on magical damage. However, a few of these classes have skills that rely on both Physical and Magical damage together, such as Clerics, Paladins, Swordsmen, Archers, Acrobats, and Sharpshooters.
 Skill Damage Formula
Average skill damage is calculated by the following formula:
(Minimum + Maximum damage / 2) * Skill Damage percent in decimals + damage bonus = Damage Output
 Critical Damage
All attacks (unless otherwise stated) have a chance to deal critical damage, shown as a large yellow number. Critical hits deal 25% more damage and ignore defense and magic defense. The chance of dealing critical damage depends on the Critical stat.
Critical damage can be resisted and deal reduced damage, shown as a large broken white number. Resisted critical deals 35% of the intended critical damage. The chance of resisting critical damage depends on the Crit Resist stat.
 Example of Skill Damage
The Physical minumum damage is 407 and the Physical Maximum damage is 644. So (407 + 644) divided by two equals 526, rounded to the nearest whole number.
(407 + 644) / 2 = 526
Shield Blow says it will use 155 percent of the character's damage and then add 52 to the total. Since a decimal is needed, it's converted into 1.55. Then using the physical damage of the character (which is 526), multiply by 1.55 and add 52 to the final number, which is 987 damage. This damage can be reduced further by the target's defense stat.
(526) * 1.55 + 52 = 867.3 damage